There’s no way to directly block a caller with the features available on the Nokia 6300 wireless phone, but there are alternatives. In the United States, the Nokia 6300 works with AT&T and T-Mobile phone service. If you subscribe to the parental control service offered by either of these providers, you can block calls to your Nokia 6300 with this service. Or, instead of directly blocking a caller, you can program the Nokia 6300 to have a silent ring for certain callers.
Block a Caller on a Nokia 6300 with AT&T Wireless Service
Go to the AT&T “Online Account Management” Web page (see the link in Resources) and log into your AT&T account.
Choose the individual member of your T-Mobile group whose settings you would like to modify. Select “Blocked Numbers.” Enter the complete 10-digit phone number (beginning with the area code) of the number you would like to block in the “Add New” section. Click “Submit.”
Block a Caller on a Nokia 6300 with T-Mobile Wireless Service
Go to the T-Mobile website (see the link in Resources) and log into your My T-Mobile account.
Click “Family Allowances” under the “Management” option. Select “Allowed Numbers.” Choose the individual member of your T-Mobile group whose Family Allowance settings you would like to modify.